They would have been Beverly's memories obviously - but we would have to assume that they were using 'accurate' ones to amplify. Therefore he had it at the time he took her to see Jack's body.
Anyway, it has no official answer I suppose, but it seems most likely to be some sort of medical application.
'If the Apocalypse starts, beep me!' - Buffy Summers
'The sky's the limit.....' Jean-Luc Picard, 'All Good Things'
courtesy of Saquist